Table 2.
Measured effects of reductions in photosynthetically active radiation (PAR) and red to far-red ratio (R:FR) on architectural traits at plant level and organ level (an example of internode and leaf at rank 6)
| Treatment | Plant level | Organ level (rank 6) | |||||
|---|---|---|---|---|---|---|---|
| PAR | R:FR | Plant height (cm) | Total leaf area (cm2) | Number of leaves | Internode length (cm) | Leaf area (cm2) | Leaf inclination angle (°) |
| High | High | 62.6 ± 0.8 ab | 778 ± 48 a | 12 ± 0.4 a | 5.0 ± 0.2 bc | 87 ± 7 ab | 29 ± 4 b |
| High | Medium | 66.7 ± 3.5 a | 781 ± 92 a | 12 ± 0.2 ab | 5.4 ± 0.1 a | 88 ± 7 a | 38 ± 7 ab |
| High | Low | 66.0 ± 2.3 a | 740 ± 43 a | 11 ± 0.6 cd | 5.3 ± 0.4 ab | 90 ± 1 a | 40 ± 6 a |
| Medium | High | 60.0 ± 2.9 b | 714 ± 15 a | 11 ± 0.4 abc | 5.0 ± 0.1 abc | 77 ± 1 c | 33 ± 10 ab |
| Medium | Low | 62.4 ± 5.6 ab | 724 ± 26 a | 11 ± 0.4 d | 5.3 ± 0.3 ab | 81 ± 2 bc | 40 ± 4 a |
| Low | High | 52.9 ± 4.0 c | 629 ± 48 b | 11 ± 0.2 bcd | 4.7 ± 0.3 c | 70 ± 3 d | 32 ± 7 ab |
Values are mean ± s.d. from four statistical replicates, each of which includes five plants. Letters following the numbers in each column indicate significant differences when comparing between treatments (P < 0.05).